Calcium half cell hanna hi4004

Calcium half cell hanna hi4004 

The HI-4004 is a liquid membrane, half-cell Ion Selective Electrode (ISE) for the detection of calcium (Ca2+) in solution. The PVC membrane comprising an organic ion exchanger produces a potential change due to the calcium ion exchange between the organic polymer membrane and the sample. The internal sensing elements are housed within a durable epoxy body.

The HI-4004 calcium ion selective electrode is a potentiometric half-cell sensor housed within an epoxy body. The internal elements are isolated from the sample by an organic polymer sensing PVC membrane. This liquid membrane sensor requires a separate reference electrode to complete the measurement system.

For the HI-4004 to measure calcium accurately, it is important that the ionic strength of the standards and sample be adjusted to a high and constant value with the calcium ionic strength adjuster (ISA) solution. The ISA ensures that the activity coefficient is constant so the concentration of free calcium ions can be measured. Measuring all solutions with a constant ionic strength reduces the margin of error between measurements. The HI-4004 calcium liquid membrane ISE can measure from 3µM (0.12 mg/L) to 1M (40,080 mg/L).

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